Microscopic simulation model of Josephson junctions for standard circuit analysis programs

A microscopic simulation model is formulated with the convenient notation of standard circuit analysis programs for digital computers, such as SCEPTRE, ASTAP, etc. The complex Josephson and quasiparticle currents with finite slopes at the gap are approximated with two networks with up to 8 lumped elements each. The microscopic simulation model yields considerably more reliable results than a refined RCSJ-model on the expense of an 30 % longer computation time.